NGC 2327 Narrow Band with RGB Stars
There is a 2020 version of this area HERE
A region of nebulosity that lies along the border between the constellations Monoceros and Canis Major and is close to Sirius, the brightest star in the night sky . The nebula lies more than four hundred times further away than that famous star. It is a roughly circular H II region centered on the Be star HD 53367. Although a small bright clump in the Seagull Nebula complex was observed for the first time by the German-British astronomer Sir William Herschel back in 1785, the greater part had to await photographic discovery about a century later. This was discovered by Welsh amateur astronomer Isaac Roberts and was described by him as, "pretty bright, extremely large, irregularly round, very diffuse."
The name Seagull Nebula is sometimes applied by amateur astronomers to this emission region, although it more properly includes the neighboring regions of star clusters, dust clouds and reflection nebulae. This latter region includes the open clusters NGC 2335 and NGC 2343.
The complex of gas and dust that forms the head of the seagull glows brightly in the sky due to the strong ultraviolet radiation coming mostly from one brilliant young star — HD 53367 — that can be spotted in the upper left quadrant of the image and could be taken to be the seagull’s eye.
Imaging telescopes or lenses: Takahashi FSQ130ED
Imaging cameras: QSI 6120
Mounts: Takahashi EM 400 Temma 2M
Guiding telescopes or lenses: Takahashi FS60CB
Guiding cameras: QHY CCD QHY 5 II
Focal Extender / Reducer: Tak QE 0.73X Reducer
Software: PHD 2, Pleiades Astrophoto PixInsight , Astro Pixel Processor (for stacking), Sequence Generator Pro SGP (for capture)
Filters: Astrodon Ha (3nm), Astrodon OIII (3nm) & Astrodon SII (3nm), Astrodon RGB
Accessories: Robofocus Focuser, ATIK EFW3
Original Resolution: 4220 x 2840
Dates: 19th Feb to 15th Mar. '18
Frames:
Astrodon Ha 21 x 20'
Astrodon OIII 15 x 20'
Astrodon SII 15 x 20'
RGB 27 x 10'
Total Time: 21.5 Hours.
Center (RA, Dec):(106.374, -10.857)
Center (RA, hms):07h 05m 29.849s
Center (Dec, dms):-10° 51' 24.321"
Size:1.58 x 1.06 deg
Radius:0.950 deg
Pixel scale:1.34 arcsec/pixel
Orientation:Up is 90.8 degrees E of N
The name Seagull Nebula is sometimes applied by amateur astronomers to this emission region, although it more properly includes the neighboring regions of star clusters, dust clouds and reflection nebulae. This latter region includes the open clusters NGC 2335 and NGC 2343.
The complex of gas and dust that forms the head of the seagull glows brightly in the sky due to the strong ultraviolet radiation coming mostly from one brilliant young star — HD 53367 — that can be spotted in the upper left quadrant of the image and could be taken to be the seagull’s eye.
Imaging telescopes or lenses: Takahashi FSQ130ED
Imaging cameras: QSI 6120
Mounts: Takahashi EM 400 Temma 2M
Guiding telescopes or lenses: Takahashi FS60CB
Guiding cameras: QHY CCD QHY 5 II
Focal Extender / Reducer: Tak QE 0.73X Reducer
Software: PHD 2, Pleiades Astrophoto PixInsight , Astro Pixel Processor (for stacking), Sequence Generator Pro SGP (for capture)
Filters: Astrodon Ha (3nm), Astrodon OIII (3nm) & Astrodon SII (3nm), Astrodon RGB
Accessories: Robofocus Focuser, ATIK EFW3
Original Resolution: 4220 x 2840
Dates: 19th Feb to 15th Mar. '18
Frames:
Astrodon Ha 21 x 20'
Astrodon OIII 15 x 20'
Astrodon SII 15 x 20'
RGB 27 x 10'
Total Time: 21.5 Hours.
Center (RA, Dec):(106.374, -10.857)
Center (RA, hms):07h 05m 29.849s
Center (Dec, dms):-10° 51' 24.321"
Size:1.58 x 1.06 deg
Radius:0.950 deg
Pixel scale:1.34 arcsec/pixel
Orientation:Up is 90.8 degrees E of N
Some might like this.....it is a crop from the full resolution of the above image (rotated 180°)
Clouds of IC 2177:
Clouds of IC 2177:
Click on image for higher resolution
Another Version: Mixing the NB & RGB data 40:60
Narrow Band & RGB data mix.
Click on the image for FULL resolution
And a closer look at the "head" of the Seagull......
Click on the image for FULL resolution
Sky Map
Annotated Image
Ha, SII & OIII in the image:
An interesting area - lower right in the main image:
Thanks to Ann (Color Commentator) on the Starship Asterisk forum:
"Your star is HD 53974, also known as FN Canis Majoris. FN CMa is a powerful star of spectral class B0.5IV, a massive star which may be some 5,000 times brighter than the Sun in visual light. FN CMa may be in the beginning of the instability that follows when a star has exhausted its core hydrogen. It makes good sense that such a star would cause an arc that glows blue."
"Your star is HD 53974, also known as FN Canis Majoris. FN CMa is a powerful star of spectral class B0.5IV, a massive star which may be some 5,000 times brighter than the Sun in visual light. FN CMa may be in the beginning of the instability that follows when a star has exhausted its core hydrogen. It makes good sense that such a star would cause an arc that glows blue."
